On page 72 of Small Boat, Great Mountain, Ajahn Amaro translates “cittam abhassaram, akandukehi kilesehi” as “the heart’s nature is intrinsically radiant; defilements are only visitors,” citing "A I.61". I am having trouble finding this sutta. This isn't it, as the Pali doesn't match. Googling for "akandukehi kilesehi" doesn't seem to turn up anything informative. Perhaps he is using an unusual transliteration?

Anyway, I'd appreciate a link to this sutta, and preferably an independent translation.

Thanks, piotr. I'd found that by looking for A 1.6.1 in the PTS system, but the translation seemed so different and the Pali didn't seem like a good match. I can see now that a lot of his Pali words have roots in common with the A 1.6.1-4 Pali, though. I think you're probably right.